Clamp, welding equipment and method for tailor welding of multiple sections of long round rod type parts

Abstract

The invention provides a clamp, welding equipment and a welding method for tailor welding of multiple sections of long round rod type parts. The swing frame is rotationally mounted on the bottom plate; the positioning block is arranged on the swing frame, a main V-shaped groove used for positioning the long round rod type part is formed in the positioning block, and the extending direction of the main V-shaped groove is parallel to a rotating shaft, rotating relative to the bottom plate, of the swing frame; the pressing head is adjustably arranged on the swing frame and used for pressing the long round rod type part located in the main V-shaped groove; the full-length welding driving piece comprises a driving part and a clamping jaw, all the long round rod type parts assembled in the main V-shaped groove are defined to form a welded long rod, and the clamping jaw is located at one end of the welded long rod and used for grabbing the welded long rod; the rotating shaft of the clamping jaw rotating relative to the driving part, the welded long rod and the rotating shaft of the swing frame rotating relative to the bottom plate are coaxial. By means of the welding device, automatic displacement of the welded long rod can be achieved, and the welding coaxiality of long round rod type parts can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of jigs, and particularly to a jig, a welding device and a method for butt welding of multi-segment long round bar parts. Background Art

[0002] Long round bar parts, especially slender round bar parts, are difficult to process, and phenomena such as part bending are likely to occur during the integral processing. Therefore, long round bar parts are usually processed in segments and then butt welded.

[0003] At present, the splicing and welding of multi-segment long round bar parts must be carried out in segments on a rotary chuck mechanism, and butt welding is carried out by rotating one by one in sequence. This method is not only cumbersome in operation, but also difficult to ensure the coaxiality of multi-segment welding, resulting in unstable welding and uneven quality.

[0004] Chinese Patent No. CN110170789A discloses an automatic position-changing tooling for butt welding of long bar parts, which solves the problems of poor coaxiality, difficult butt joint and inability to automatically rotate and change position during butt welding of long bar parts in the prior art. Specifically, the long bar parts are fixed in the inner ring of the support bearing through pressing elements, and the motor drives the long bar parts to realize rotary motion through mechanisms such as couplings for circumferential seam welding. The number of support bearings can be increased according to the length of the long bar parts to increase the stiffness, improve the butt joint accuracy, reduce the butt joint difficulty, and effectively ensure the coaxiality during butt welding of long bar parts.

[0005] However, when this tooling is in use, the long bar is assembled on the support bearing. It can be understood that the more long bars to be butt welded, the more support bearings are required. Theoretically, the support bearings need to be arranged at intervals along the axial direction of the long bar. However, the assembly error of the support bearings is inevitable, and the assembly error will accumulate continuously when a large number of support bearings are installed, thus affecting the coaxiality of the long bar after welding; in addition, when the long bar is positioned in the support bearing, fine adjustment needs to be carried out through set screws to align the weld seams. The manual fine adjustment method is difficult to ensure the stability of the coaxiality of the long bar and difficult to ensure the welding quality; at the same time, the welded long bar is inserted through the support bearing, and the welded long bar needs to be pulled out along its axial direction to disengage from the tooling, which requires a large working space, and the parts are easily scratched during the disassembly process. For thin-walled slender round tube parts, this disassembly method is very likely to cause part bending and deformation, with high working difficulty and low efficiency. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the first object of the present invention is to provide a jig for butt welding of multi-segment long round bar parts, which occupies a small space, has low operation difficulty, and is beneficial to ensuring the processing quality and work efficiency.

[0007] The second object of the present invention is to provide a welding device for butt welding of multi-segment long round rod parts, which can achieve high-precision butt welding of multi-segment long round rod parts, ensure coaxiality, and has high efficiency.

[0008] The third object of the present invention is to provide a method for butt welding of multi-segment long round rod parts, which can realize automatic displacement of the long rod to be welded, and effectively ensure the welding quality and the coaxiality of the long rod to be welded by combining pre-welding and full welding.

[0009] The embodiments of the present invention are realized through the following technical solutions:

[0010] A fixture for butt welding of multi-segment long round rod parts, comprising: a bottom plate; a swing frame rotatably mounted on the bottom plate; a positioning block provided on the swing frame, a main V-shaped groove for positioning long round rod parts is opened on the positioning block, and the extending direction of the main V-shaped groove is parallel to the rotation axis of the swing frame relative to the bottom plate; a pressing head adjustably provided on the swing frame for pressing the long round rod parts in the main V-shaped groove; a full welding driving member, including a driving part and a clamping jaw, the driving part is provided on the swing frame, the clamping jaw is provided on the driving part and is driven by the driving part to rotate. It is defined that all the long round rod parts assembled in the main V-shaped groove form a long rod to be welded, the clamping jaw is at one end of the long rod to be welded for grasping the long rod to be welded; the rotation axis of the clamping jaw relative to the driving part, the long rod to be welded and the rotation axis of the swing frame relative to the bottom plate are coaxial. This fixture limits the long rod to be welded through the main V-shaped groove to ensure the coaxiality between the long round rod parts constituting the long rod to be welded, and improves the processing accuracy of the long rod to be welded; in the pre-welding stage, the long round rod parts are fixed in the main V-shaped groove and rotate around their own central axes following the movement of the swing frame, ensuring the stability of the posture of the long round rod parts during the pre-welding process, which is beneficial to improving the welding accuracy and further ensuring the coaxiality of each part of the long rod to be welded; after the long rod to be welded is driven to rotate by the clamping jaw for full welding, it can be taken out from the main V-shaped groove, occupying a small space and having a low operation difficulty, which is beneficial to ensuring the processing quality and work efficiency.

[0011] According to a preferred embodiment, a first shaft frame and a second shaft frame are oppositely arranged on the bottom plate, and the swing frame is respectively rotatably connected to the first shaft frame and the second shaft frame; a first driving member is arranged on the bottom plate, and the first driving member is used to drive the swing frame to rotate relative to the first shaft frame and the second shaft frame.

[0012] According to a preferred embodiment, a pre-welding notch corresponding to the weld seam is opened on the positioning block, and the pre-welding notch communicates with the main V-shaped groove.

[0013] According to a preferred embodiment, the pre-welding notch penetrates to the inner side surface of the main V-shaped groove.

[0014] According to a preferred embodiment, the inner side surface of the bottom of the main V-groove is defined as a reference plane, the inner side surface of the bottom of the pre-welding notch is an inclined plane, and the inclined plane extends to the reference plane; the end of the inclined plane close to the reference plane is defined as the proximal end, and the end of the inclined plane far from the reference plane is defined as the distal end; in the depth direction of the main V-groove, the distance between the proximal end and the central axis of the long rod to be welded is less than the distance between the distal end and the central axis of the long rod to be welded.

[0015] According to a preferred embodiment, a hinge seat corresponding to the pressing head is assembled on the swing frame, the pressing head is rotatably installed on the hinge seat, and the pressing head can approach or move away from the main V-groove in a manner of rotating relative to the hinge seat; a first magnet is assembled on the pressing head, and a second magnet corresponding to the first magnet is assembled on the positioning block, and the first magnet and the second magnet attract each other.

[0016] According to a preferred embodiment, there are a plurality of pressing heads, which are arranged at intervals along the axial direction of the long rod to be welded; the plurality of pressing heads are connected in series by a connecting rod.

[0017] According to a preferred embodiment, a first guiding groove is formed on one side surface of the positioning block facing the swing frame, a first guiding hole is provided at the bottom of the first guiding groove, and the first guiding hole communicates with the main V-groove; a guiding block is assembled in the first guiding groove, a jacking block is arranged on the guiding block, and the jacking block is slidably embedded in the first guiding hole; the guiding block can approach or move away from the first guiding hole in the first guiding groove, so that the jacking block approaches or moves away from the long rod to be welded in the first guiding hole.

[0018] According to a preferred embodiment, a return spring is arranged between the guiding block and the inner side surface of the bottom of the first guiding groove.

[0019] According to a preferred embodiment, a second guiding groove corresponding to and communicating with the first guiding groove is formed on one side surface of the swing frame facing the positioning block, a second guiding hole is formed through the bottom of the second guiding groove, a driving pin is slidably embedded in the second guiding hole, a driving block is arranged at one end of the driving pin close to the first guiding groove, the outer diameter of the driving block is larger than the inner diameter of the second guiding hole, and the driving block can extend from the second guiding groove to the first guiding groove to drive the guiding block to move towards the first guiding hole.

[0020] A welding device for butt welding of multi-segment long round rod-like parts includes a laser welding head and the aforementioned fixture for butt welding of multi-segment long round rod-like parts. This welding device can achieve high-precision butt welding of multi-segment long round rod-like parts, can ensure coaxiality, and has high efficiency.

[0021] A method for welding and assembling multi-segment long round rod parts, which is applied to the welding equipment for welding and assembling multi-segment long round rod parts described above, includes the following steps: placing the multi-segment long round rod parts in the main V-shaped groove and splicing them in sequence to form a long rod to be welded, and at the same time, assembling the long round rod parts adjacent to the full-welding driving part on the jaws; pressing and fixing the long rod to be welded through a pressing head; driving the swing frame to rotate within a certain angle range to pre-weld the weld seam; driving the long rod to be welded to rotate by itself through the full-welding driving part to full-weld the weld seam. Through the above steps, automatic displacement of the long rod to be welded can be achieved, and the welding quality and the coaxiality of the long rod to be welded can be effectively guaranteed by combining pre-welding and full-welding; there is an opportunity to adjust the posture of the long rod to be welded before full-welding, and defective products can be timely removed or remedied, which is beneficial to improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0023] Figure 1 A three-dimensional structural schematic diagram of the fixture provided by an embodiment of the present invention;

[0024] Figure 2 For Figure 1 A partial enlarged schematic diagram of the structure at A in

[0025] Figure 3 For Figure 1 A partial enlarged schematic diagram of the structure at B in

[0026] Figure 4 An assembly structure schematic diagram of the pressing head and the positioning block in the present invention;

[0027] Figure 5 A front view structural schematic diagram of the fixture provided by an embodiment of the present invention;

[0028] Figure 6 For Figure 5 A sectional structural schematic diagram of the C-C section in

[0029] Figure 7 For Figure 6 A partial enlarged schematic diagram of the structure at E in

[0030] Figure 8 An exploded schematic diagram of the assembly structure of the swing frame and the driving pin provided by an embodiment of the present invention;

[0031] Figure 9 is Figure 5 a schematic cross-sectional view of the D-D section in

[0032] Figure 10 is Figure 9 a partially enlarged schematic view of the structure at position F in

[0033] Figure 11 a flowchart of the method for multi-segment long round rod-like part welding provided by the embodiment of the present invention.

[0034] Icon: 1, bottom plate; 11, first shaft support; 12, second shaft support; 13, first driving member; 14, third shaft support; 15, coupling; 2, swing frame; 21, hinge seat; 211, first pin shaft; 22, second guide groove; 221, second guide hole; 23, limit block; 24, clamping groove; 3, positioning block; 31, main V-shaped groove; 311, reference plane; 32, pre-welding notch; 321, inclined plane; 33, second magnet; 34, first guide groove; 35, first guide hole; 4, welded long rod; 40, weld seam; 41, long round rod-like part; 5, full-welding driving member; 50, clamping jaw; 501, secondary V-shaped groove; 51, driving part; 6, pressing head; 61, first magnet; 62, connecting rod; 63, roller; 64, second pin shaft; 7, guide block; 71, jacking block; 72, return spring; 8, driving pin; 81, driving block; 9, jacking cylinder; a, proximal end; b, distal end. Detailed implementation manners

[0035] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention.

[0038] Please refer to Figures 1 to 10, A fixture for the butt welding of multi-segment long round rod parts, comprising a bottom plate 1, a swing frame 2, a positioning block 3, a pressure head 6 and a full-welding driving member 5, wherein: the swing frame 2 is rotatably mounted on the bottom plate 1; the positioning block 3 is arranged on the swing frame 2, and a main V-shaped groove 31 for positioning the long round rod part 41 is formed on the positioning block 3, and the extending direction of the main V-shaped groove 31 is parallel to the rotation axis of the swing frame 2 relative to the bottom plate 1; the pressure head 6 is adjustably arranged on the swing frame 2 and is used for pressing the long round rod part 41 located in the main V-shaped groove 31; the full-welding driving member 5 includes a driving part 51 and a jaw 50, the driving part 51 is arranged on the swing frame 2, the jaw 50 is arranged on the driving part 51 and is driven by the driving part 51 to rotate. It is defined that all the long round rod parts 41 assembled in the main V-shaped groove 31 form a welded long rod 4, and the jaw 50 is located at one end of the welded long rod 4 and is used for grasping the welded long rod 4; the rotation axis of the jaw 50 relative to the driving part 51, the welded long rod 4 and the rotation axis of the swing frame 2 relative to the bottom plate 1 are coaxial. Optionally, the number of the pressure heads 6 is the same as the number of the long round rod parts 41, and they are arranged in one-to-one correspondence.

[0039] In use, first, the oval rod-shaped parts 41 to be welded are placed in the main V-shaped groove 31 and spliced in sequence to form the long rod 4 to be welded. Subsequently, the corresponding oval rod-shaped parts 41 are pressed and fixed by the pressing head 6, so as to fix the long rod 4 to be welded in the main V-shaped groove 31. Under the limiting action of the main V-shaped groove 31, the coaxiality, that is, the concentricity, of multiple oval rod-shaped parts 41 is ensured. At the same time, the oval rod-shaped parts 41 adjacent to the full-welding driving part 5 are assembled on the clamping jaws 50. Subsequently, the swing frame 2 rotates relative to the bottom plate 1 within a certain angle range, that is, presents a swinging form. During this process, the long rod 4 to be welded in the main V-shaped groove 31 moves with the swing frame 2 and rotates around its central axis. During this process, a laser welding head is used to pre-weld the weld 40 (spot welding or partial continuous welding can be carried out according to the actual situation), so that the long rod 4 to be welded formed by splicing multiple oval rod-shaped parts 41 forms a whole, and its stiffness is greatly improved. Finally, the clamping jaws 50 rotate relative to the driving part 51 to drive the long rod 4 to be welded to rotate around the central axis of the long rod 4 to be welded in the main V-shaped groove 31. During this process, the weld 40 is fully welded. Thus, the welding of the long rod 4 to be welded is completed. After the clamping jaws 50 are separated from the long rod 4 to be welded, the limiting of the pressing head 6 on the long rod 4 to be welded is released, and the long rod 4 to be welded can be taken out from the main V-shaped groove 31. Compared with the prior art, this fixture limits the long rod 4 to be welded through the main V-shaped groove 31 to ensure the coaxiality between the oval rod-shaped parts 41 constituting the long rod 4 to be welded, and improves the machining accuracy of the long rod 4 to be welded; in the pre-welding stage, the oval rod-shaped parts 41 are fixed in the main V-shaped groove 31 and rotate around their own central axes by following the movement of the swing frame 2, ensuring the stability of the posture of the oval rod-shaped parts 41 during the pre-welding process, which is beneficial to improving the welding accuracy and further ensuring the coaxiality of each part of the long rod 4 to be welded; after the long rod 4 to be welded is driven to rotate by the clamping jaws 50 for full welding and then taken out from the main V-shaped groove 31, this fixture occupies a small space and has a low operation difficulty, which is beneficial to ensuring the machining quality and working efficiency.

[0040] As Figure 1 and Figure 3 shown, there are two clamping jaws 50, and they are arranged oppositely. Secondary V-shaped grooves 501 are formed on the adjacent side surfaces of the two clamping jaws 50 for positioning and clamping the long rod 4 to be welded. In use, the full-welding driving part 5 composed of the clamping jaws 50 and the driving part 51 can be an electric rotating clamping jaw 50. In some embodiments, the electric rotating clamping jaw 50 can be of the three-jaw chuck type. In this case, the secondary V-shaped grooves 501 do not need to be provided on the clamping jaws 50. The electric rotating clamping jaw 50 is a prior art and will not be elaborated here.

[0041] As Figure 1 and Figure 5As shown in the figure, a first shaft bracket 11 and a second shaft bracket 12 are oppositely arranged on the bottom plate 1, and the swing bracket 2 is rotatably connected to the first shaft bracket 11 and the second shaft bracket 12 respectively; a first driving member 13 is arranged on the bottom plate 1, and the first driving member 13 is used to drive the swing bracket 2 to rotate relative to the first shaft bracket 11 and the second shaft bracket 12. The first end of the swing bracket 2 is rotatably assembled with the first shaft bracket 11 through a bearing, and the second end of the swing bracket 2 is rotatably assembled with the second shaft bracket 12 through a bearing. Both ends of the swing bracket 2 are fixedly connected to the inner ring of the corresponding bearing; a third shaft bracket 14 is further arranged on the bottom plate 1, the second shaft bracket 12 is located between the first shaft bracket 11 and the third shaft bracket 14, the first driving member 13 is a motor, assembled on the third shaft bracket 14, and the first driving member 13 is connected to the second end of the swing bracket 2 through a coupling 15.

[0042] As Figure 1 and Figure 2 shown in the figure, a pre-welding notch 32 corresponding to the weld 40 is formed on the positioning block 3, and the pre-welding notch 32 communicates with the main V-shaped groove 31. The pre-welding notch 32 here is used to more expose the weld 40 area in the circumferential direction of the long rod 4 to be welded, so as to have more solder joint selection in the pre-welding stage, and then fully pre-weld the weld 40 to ensure the stiffness of the long rod 4 to be welded, so as to ensure coaxiality and no deformation during the subsequent full rotation welding process. In use, the laser beam can be projected onto the weld 40 through the area above the main V-shaped groove 31, or can be projected onto the weld 40 through the pre-welding notch 32.

[0043] Optionally, the pre-welding notch 32 penetrates through to the inner side surface of the main V-shaped groove 31. In this way, during the rotation of the swing bracket 2, continuous pre-welding work can be carried out on the weld 40 area exposed through the main V-shaped groove 31 and the weld 40 area exposed through the pre-welding notch 32, which is beneficial to improving work efficiency. In other words, the weld 40 area exposed through the main V-shaped groove 31 and the weld 40 area exposed through the pre-welding notch 32 are continuous, and there is no occlusion between them, which is convenient for continuous pre-welding.

[0044] Further, as Figure 5 , Figure 9 and Figure 10As shown in the figure, define the inner side surface of the bottom of the main V-groove 31 as the reference plane 311, and the inner side surface of the bottom of the pre-welding notch 32 as the inclined plane 321. The inclined plane 321 extends to the reference plane 311. Define the end of the inclined plane 321 close to the reference plane 311 as the proximal end a, and the end of the inclined plane 321 far from the reference plane 311 as the distal end b. In the depth direction of the main V-groove 31, the distance between the proximal end a and the axis of the long rod 4 to be welded is less than the distance between the distal end b and the axis of the long rod 4 to be welded. The rotation axis of the swing frame 2 for rotation is coaxial with the long rod 4 to be welded, or in other words, the rotation axis of the swing frame 2 for rotation is collinear with the central axis of the long rod 4 to be welded. In the depth direction of the main V-groove 31, the structural design with the distance between the proximal end a and the axis of the long rod 4 to be welded being less than the distance between the distal end b and the axis of the long rod 4 to be welded increases the channel width of the laser beam projected onto the weld 40 area, making the weld 40 area more exposed and providing the possibility for more sufficient pre-welding. For example, in the depth direction of the main V-groove 31, the distance between the proximal end a and the axis of the long rod 4 to be welded is H1, and the distance between the distal end b and the axis of the long rod 4 to be welded is H2, then H2 > H1.

[0045] As Figure 4 shown in the figure, a hinge seat 21 corresponding to the pressure head 6 is assembled on the swing frame 2. The pressure head 6 is rotatably installed on the hinge seat 21, and the pressure head 6 can approach or move away from the main V-groove 31 in a way of rotating relative to the hinge seat 21. A first magnet 61 is assembled on the pressure head 6, and a second magnet 33 corresponding to the first magnet 61 is assembled on the positioning block 3. The first magnet 61 and the second magnet 33 attract each other. Specifically, the pressure head 6 is rotatably installed on the hinge seat 21 through a first pin shaft 211, and the pressure head 6 is magnetically fixed by the mutual attraction of the first magnet 61 and the second magnet 33, realizing the quick clamping of the long round rod-like part 41 or the long rod 4 to be welded by the pressure head 6.

[0046] As Figure 1 and Figure 5 shown in the figure, there are multiple pressure heads 6, which are arranged at intervals along the axial direction of the long rod 4 to be welded. The multiple pressure heads 6 are connected in series through a connecting rod 62. With this arrangement, it is convenient to control multiple pressure heads 6 simultaneously and improve work efficiency. Preferably, the axial direction of the connecting rod 62 is parallel to the axial direction of the long rod 4 to be welded.

[0047] Optionally, as Figure 2 and Figure 4As shown, a roller 63 is rotatably mounted at the top end of the indenter 6 through a second pin shaft 64. The axial direction of the roller 63 is parallel to the axial direction of the long rod 4 to be welded. During use, the roller 63 is in line contact with the long rod 4 to be welded. Specifically, in the full-weld stage, during the rotation of the long rod 4 to be welded, the roller 63 limits the long rod 4 to be welded to prevent it from jumping, and at the same time helps to reduce the frictional force between the indenter 6 and the long rod 4 to be welded. In another embodiment, the working end of the indenter 6 can also be set as a cylindrical surface protruding towards the long rod 4 to be welded. Correspondingly, during the rotation of the long rod 4 to be welded, the long rod 4 to be welded has a sliding friction with the indenter 6 or the cylindrical surface.

[0048] Of course, in another embodiment, the indenter 6 can also be driven by a telescopic member such as a cylinder (not shown in the figure) provided on the swing frame 2 or the positioning block 3 to achieve the action of the indenter 6 rotating around the first pin shaft 211.

[0049] As Figures 5 to 8 shown, a first guiding groove 34 is formed on one side surface of the positioning block 3 facing the swing frame 2. A first guiding hole 35 is provided at the bottom of the first guiding groove 34, and the first guiding hole 35 communicates with the main V-shaped groove 31; a guiding block 7 is assembled in the first guiding groove 34, and a jacking block 71 is arranged on the guiding block 7. The jacking block 71 is slidably embedded in the first guiding hole 35; the guiding block 7 can move closer to or away from the first guiding hole 35 in the first guiding groove 34, so that the jacking block 71 moves closer to or away from the long rod 4 to be welded in the first guiding hole 35. After the long rod 4 to be welded is welded, the guiding block 7 moves in the opposite direction of the depth direction of the main V-shaped groove 31, so that the jacking block 71 passes through the first guiding hole 35 and approaches the long rod 4 to be welded until it abuts against and drives the long rod 4 to be welded out of the main V-shaped groove 31 for the quick blanking of the long rod 4 to be welded.

[0050] In some embodiments, in order to facilitate the quick reset of the guiding block 7, that is, the jacking block 71, as Figure 7 shown, a reset spring 72 is arranged between the guiding block 7 and the inner side surface of the bottom of the first guiding groove 34. It should be noted that during the process of the jacking block 71 jacking up the long rod 4 to be welded out of the main V-shaped groove 31, the reset spring 72 is compressed. Therefore, when the acting force on the guiding block 7 in the opposite direction of the depth direction of the main V-shaped groove 31 is removed, the guiding block 7 quickly resets under the action of the reset spring 72.

[0051] Furthermore, a second guide groove 22 corresponding to and connected to the first guide groove 34 is provided on one side of the swing frame 2 facing the positioning block 3. A second guide hole 221 is provided through the bottom of the second guide groove 22. A driving pin 8 is slidably embedded in the second guide hole 221. A driving block 81 is arranged at one end of the driving pin 8 close to the first guide groove 34. The outer diameter of the driving block 81 is larger than the inner diameter of the second guide hole 221. The driving block 81 can extend from the second guide groove 22 to the first guide groove 34 to drive the guide block 7 to move toward the first guide hole 35. In this embodiment, the second guide hole 221 passes through the swing frame 2, and the end of the driving pin 8 away from the driving block 81 extends to the outside of the second guide hole 221. When in use, the driving pin 8 is driven by an external force to drive the lifting block 71 to move. Figure 6 The state shown in the figure is used as an example to illustrate that a lifting cylinder 9 is provided on the bottom plate 1, and the lifting cylinder 9 corresponds to the driving pin 8 one by one. Figure 6 In the state shown, the driving pin 8 is facing the driving cylinder in the longitudinal direction. At this time, the driving cylinder can act on the driving pin 8 to make it move upward in the longitudinal direction, so as to drive the welded long rod 4 to disengage from the main V-groove 31 through the guide block 7 and the lifting block 71.

[0052] In some embodiments, the side wall of the long round rod-like part 41 has an opening (not shown in the figure). During welding, it is necessary to ensure the circumferential position of the opening of the long round rod-like part 41. At this time, the lifting block 71 is configured to match the shape of the opening. When in use, the long round rod-like part 41 is positioned by embedding the lifting block 71 into the opening to ensure that the circumferential state of the long round rod-like part 41 in the main V-groove 31 is stable. In this embodiment, the lifting block 71 plays a positioning role. It should be noted that in this embodiment, during the full welding stage, the lifting block 71 needs to be reset to disengage from the opening or the long round rod-like part 41 to ensure that the long round rod-like part 41 or the welded long rod 4 can rotate in the main V-groove 31. Furthermore, in this embodiment, pre-welding is divided into two stages. Specifically, in the first pre-welding stage, the lifting block 71 is inserted into the opening for positioning, the swing frame 2 maintains the initial state, and the laser beam is projected to the weld 40 for spot welding or partial continuous welding. The circumferential posture of each long round rod-like part 41 is fixed by pre-welding; in the second pre-welding stage, the lifting block 71 is reset to disengage from the opening, and the swing frame 2 is rotated to realize the self-rotation of the welded long rod 4 within a certain angle range, and a large range of spot welding or partial continuous welding is performed on the weld 40. The second pre-welding stage has the same steps as the pre-welding stage in the previous text, and will not be repeated here.

[0053] In some embodiments, a side of the swing frame 2 facing the positioning block 3 is provided with a clamping groove 24 for clamping the positioning block 3. The positioning block 3 is assembled in the clamping groove 24 and can be detachably assembled by screws or bolts. When a change of type is required, the positioning block 3 of different specifications can be replaced.

[0054] likeFigure 1 and Figure 5 As shown, a limit block 23 is mounted on the swing frame 2 , and the limit block 23 is arranged opposite to the full welding driving member 5 , and is used to limit the axial position of the long rod 4 to be welded.

[0055] This embodiment also provides a welding device for welding a plurality of long round rod parts 41, comprising a laser welding head and the aforementioned fixture for welding a plurality of long round rod parts. Based on the aforementioned fixture, the welding device can achieve high-precision welding of a plurality of long round rod parts 41, realize automatic displacement of the welded long rod 4, ensure coaxiality, and have high efficiency.

[0056] like Figure 11 As shown, this embodiment also provides a method for welding a plurality of long round rod parts, which is applied to a welding device for welding a plurality of long round rod parts, and comprises the following steps:

[0057] S1: placing multiple sections of long round rod parts 41 in the main V-shaped groove 31 and splicing them in sequence to form the welded long rod 4, and at the same time assembling the long round rod parts 41 adjacent to the fully welded driving member 5 on the clamping jaws 50;

[0058] S2: Press and fix the long rod 4 to be welded by the pressing head 6;

[0059] S3: driving the swing frame 2 to rotate within a certain angle range to pre-weld the weld 40;

[0060] S4: The long rod 4 to be welded is driven to rotate by the full welding driving member 5 to fully weld the weld 40 .

[0061] Through the above steps, the automatic displacement of the long rod 4 to be welded is realized, and the welding quality and the coaxiality of the long rod 4 to be welded are effectively guaranteed by combining pre-welding and full welding. At the same time, by combining pre-welding and full welding, there is a chance to adjust the posture of the long rod 4 to be welded before full welding, and defective products can be unloaded or remedied in time, which is conducive to improving processing efficiency.

[0062] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A fixture for the butt welding of multi-segment long round rod parts, characterized in that, Comprising: Base plate; Swing frame, rotatably mounted on the base plate; Positioning block, arranged on the swing frame, a main V-shaped groove for positioning long round rod-like parts is formed on the positioning block, and the extending direction of the main V-shaped groove is parallel to the rotation axis of the swing frame relative to the base plate; Press head, adjustably arranged on the swing frame, for pressing the long round rod-like parts in the main V-shaped groove; Full-welding driving part, including a driving part and a clamping jaw, the driving part is arranged on the swing frame, the clamping jaw is arranged on the driving part and is driven by the driving part to rotate. Define that all the long round rod-like parts assembled in the main V-shaped groove form a long rod to be welded. The clamping jaw is at one end of the long rod to be welded and is used for grasping the long rod to be welded; the rotation axis of the clamping jaw relative to the driving part, the long rod to be welded, and the rotation axis of the swing frame relative to the base plate are coaxial.

2. The fixture for butt welding of multi-section long round rod parts according to claim 1, wherein, A first shaft bracket and a second shaft bracket are oppositely arranged on the base plate, and the swing frame is respectively rotationally connected to the first shaft bracket and the second shaft bracket; A first driving part is arranged on the base plate, and the first driving part is used for driving the swing frame to rotate relative to the first shaft bracket and the second shaft bracket.

3. The jig for butt welding of multi-segment long round rod parts according to claim 1, characterized in that, A pre-welding notch corresponding to the weld seam is formed on the positioning block, and the pre-welding notch communicates with the inside of the main V-shaped groove.

4. The fixture for butt welding of multi-segment long round bar parts according to claim 3, characterized in that The pre-welding notch penetrates through to the inner side surface of the main V-shaped groove.

5. The fixture for multi-segment oval rod-like part butt welding according to claim 4, characterized in that, Define the inner side surface of the bottom of the main V-shaped groove as the reference plane, the inner side surface of the bottom of the pre-welding notch is an inclined plane, and the inclined plane extends to the reference plane; Define the end of the inclined plane close to the reference plane as the proximal end, and the end of the inclined plane far from the reference plane as the distal end; In the depth direction of the main V-shaped groove, the distance between the proximal end and the central axis of the long rod to be welded is less than the distance between the distal end and the central axis of the long rod to be welded.

6. The jig for butt welding of multi-segment long round bar parts according to claim 1, wherein, A hinge seat corresponding to the press head is assembled on the swing frame, the press head is rotatably mounted on the hinge seat, and the press head can approach or move away from the main V-shaped groove in a manner of rotating relative to the hinge seat; A first magnet is assembled on the press head, and a second magnet corresponding to the first magnet is assembled on the positioning block, and the first magnet and the second magnet attract each other.

7. The fixture for butt welding of multi-segment long round rod parts according to claim 6, characterized in that, There are multiple press heads, and they are arranged at intervals along the axial direction of the long rod to be welded; The multiple press heads are connected in series through a connecting rod.

8. The fixture for butt welding of multi-section long round bar parts according to claim 1, characterized in that, A first guiding groove is formed on one side surface of the positioning block facing the swing frame, a first guiding hole is arranged at the bottom of the first guiding groove, and the first guiding hole communicates with the main V-shaped groove; A guiding block is assembled in the first guiding groove, a jacking block is arranged on the guiding block, and the jacking block is slidably embedded in the first guiding hole; The guiding block can approach or move away from the first guiding hole in the first guiding groove, so that the jacking block approaches or moves away from the long rod to be welded in the first guiding hole.

9. The jig for butt welding of multi-section long round bar parts according to claim 8, characterized in that, A return spring is arranged between the guiding block and the inner side surface of the bottom of the first guiding groove.

10. The fixture for butt welding of multi-segment long round rod parts according to claim 8, characterized in that, One side of the swing frame facing the positioning block is provided with a second guiding groove corresponding to and communicating with the first guiding groove. A second guiding hole is penetrated through the bottom of the second guiding groove. A driving pin is slidably embedded in the second guiding hole. One end of the driving pin close to the first guiding groove is configured with a driving block. The outer diameter of the driving block is larger than the inner diameter of the second guiding hole. The driving block can extend from the second guiding groove to the first guiding groove to drive the guiding block to move towards the first guiding hole.

11. A welding device for the butt welding of multi-section long round rod parts, characterized in that, It includes a laser welding head and a jig for butt welding of multi-section long round bar parts as described in any one of claims 1-10.

12. A method for the butt welding of multi-section long round rod parts, which is applied to the welding equipment for the butt welding of multi-section long round rod parts as described in claim 11, characterized in that, It includes the following steps: Place multi-section long round bar parts in the main V-shaped groove and splice them in sequence to form a long bar to be welded. At the same time, assemble the long round bar parts adjacent to the full-welding driving member on the jaws. Press and fix the long bar to be welded through a pressure head. Drive the swing frame to rotate within a certain angle range to pre-weld the weld seam. Drive the long bar to be welded to rotate by the full-welding driving member to full-weld the weld seam.

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